| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Outline of Final Research Achievements |
Near-field optical microscope achieves a nanometer spatial resolution, and is of great use for studying optical properties of nanomaterials. However, the method is not fully compatible to conventional spectroscopic methods. For example, near-field reflection spectroscopy was not established because of large background light with respect to a tiny near-field signal. We proposed to extract near-field signal from the observed reflection by using phase-stepping technique. We developed near-field reflection microscope and applied it to study optical properties of a silver nanoplate. The microscope improves the signal to noise greatly and enables to recover a tiny signal from observed reflected light. Near-field reflection image of the plate shows periodic spatial oscillations attributable to plasmon modes. The microscope enables to study nanostructures not only on the transparent substrate but also on the opaque substrate, and has a great potential as a general analytical tool.
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